a.) If a student randomly guesses at 20 multiple-choice questions, find the probability that the student gets exactly four correct. Each question has four possible choices.
0.190
0.162
0.085
0.218
b.) 80% of members of a club consume alcoholic beverage. Of 14 members are randomly selected what is the probability that all of them drinks alcohol beverage?
0.044
0
1
0.8
c.) A school is sending 12 children to a camp. If 20% of the children in the school are first graders, and the 12 children are selected at random from among all 6 grades at the school, find the mean and variance of the number of first graders chosen?
d.) At a particular hospital, 40% of staff are nurse assistants. If 12 staff members are randomly selected, what is the probability that exactly 4 are nurse assistants?
a.) If a student randomly guesses at 20 multiple-choice questions, find the probability that the student...
If a student randomly guesses at 20 questions, find the probability that the student gets exactly four correct. Each question has four possible choices. multiple-choice
7. a. b. c. Assume that random guesses are made for nine multiple choice questions on an SAT test, so that there are n = 9 trials, each with probability of success (correct) given by p = 0.2. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4. P(X<4)= (Round to four decimal places as needed.) Assume that random guesses are made for 2 multiple-choice questions...
A student takes an exam containing 14 multiple choice questions. The probability of choosing a correct answer by knowledgeable guessing is 0.5. If the student makes knowledgeable guesses, what is the probability that he will get exactly 3 questions right? Round your answer to four decimal places
A student takes an exam containing 19 multiple choice questions. The probability of choosing a correct answer by knowledgeable guessing is 0.4. If the student makes knowledgeable guesses, what is the probability that he will get exactly 5 questions right? Round your answer to four decimal places.
#58 d 4 members of the Green lected from the group, find ependent or a Green. 4 Years High College 4 Years High School (Less than College School Only 4 years) (or More) Total ind the probability of rolling Male than 5. 20 23 82 Female Total 14 15 29 han 4. 45 174 card from a 52-card deck. Source: U.S. Census Bureau Find the probability, expressed as a simplified fraction, thata randomly selected American, age 25 or over 41....